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论述了用数控火焰切割机加工鼓风机叶轮叶片焊接端面曲线及其变角度坡口面的加工原理及数学模型，并介绍了相应的数控程序的自动编程系统。
The machining principle and mathematical model of the welding end surface curve of the impeller blades of the blower and its variable angle bevel surface are discussed with the numerical control flame cutting machine, and the corresponding automatic programming system of NC program is introduced.